Dara Stoltzfus compares bad behavior in our children to Weeds in a Garden and comes up with some interesting allegories.
This is a little off topic, but I just came across a news story about a family who noticed their very gentle dog acting aggressively towards the baby sitter. They left a device under the couch to record and found out the awful truth. I post this as a reminder to never dismiss strange behavior in animals or children. When a small child or trusted pet suddenly shows explainable fear or aggression towards someone, take it as a red flag and investigate.